Its a lot to read but this is the right way to do it
I spray 5 or 6 trucks at work a week and the important part to a good liner like all paint applications is prep work, if you are spraying with a gun you want to make sure to tape the truck with a wire tape (tape with a wire in it to cut the liner and not pull it off) regular tape wont pull through a sprayed liner or it shouldnt, if it does its too thin and wont last. Cover more of the truck than you think you need to cause overspray with this stuff is a bitch. after it is masked start sanding, I sand my trucks with a 80 grit sandpaper around the edges being sure to sand to the very edge of the tape and the rest with a fiber wheel on a buffer ( DO NOT USE A GRINDER, YOU WAND LOW RPM'S). After it is sanded blow out any dust or dirt and wash out with a good thinner making sure to wash in small (3ft square areas) and then wipe of buff with a dry cloth to remove residue from the thinners if you dont wipe the residue the liner wont stick. When you are saticefied that it is clean wipe with a tack cloth, you will be supprised how much dust this will pick up. your truck is now ready to spray, the system I use heats and mixes the 3 parts up the liner before it gets to the gun yours wont. It is always a good Idea to warm your material before spraying even a cold spray product will benifet from being warm you dont need it really hot just a little warm ( I recomend heating before mixing ). When I spray I do it from inside the truck starting on the drivers side with a up and down pattern spray the side of the box not including the wheel well until I get to the other side of the wheel well then I spray the top of the hump and the side til I get back to the box side where I ended and work my way to the front corner where I make three passes over the top lip of the front of the box and down the pass side corner and accross the bottom corner back to the dr side then a up and down pattern accross the front pannel to the passenger side of the truck and continue down the passenger side of the boxside in the same manner as the driver side. when I get to the taillight area i will come back up the floor til I get to the wheel well and put a second coat on the wheel well and continue up towards the cab on the corner of the floor and around to the driver side wheel well for its second coat and back to the driver side taillight, then repeat so you have 2 coats of the sides and 3 on the wheel wells. time for the floor, its done in three sections, start at the cab and spray 1/3 of the way back then spray a layer over that stopping about 4 inches before the first coat, and another on top of that stopping about 4 inches before the second coat. next spray the next 1/3rd of the floor in the same manner, 3 coats each meeting where the other one ended so they are over lapped and leaving about a 4 inch difference at the ends. the final 1/3rd of the floor is done the same way at this point you will be standing on a step stool at the back of the truckand each coat will end at the end of the box but meet overlapping where the last coat ended, the overlapping ensures a level seam whete each section meets. to get your texture turn your air pressure up and spray a mist over the truck as quick as you can about 5 ft away from where the mist is landing, repeat until you get desired texture ( three coats for me ) of cours the tailgate is off the truck and needs to be done seperatly with three even coats and mist coates for texture.
My gun dont have a trigger, I have to have flow at all times or the material will harden in the gun and I will need to change the tip which has to be changed for every liner I can only turn the flow on and off and adjust air pressure, I dont know how much of this is relevent to you but this is how it is done professionally
SAFETY: if you dont have a fresh air system make sure you use some sort of resperator this shit will kill you, get a tyveck sute and wear gloves and dont weal footwear that you like cause you will ruin them
I hope this helps you get a better liner, take pics and let us know how it turns out
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